Settable, form-filling loss circulation control compositions comprising in situ foamed non-hydraulic sorel cement systems and method of use
US-10150905-B1 · Dec 11, 2018 · US
Settable, form-filling loss circulation control compositions comprising in situ foamed non-hydraulic sorel cement systems and method of use
US10287481B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-10287481-B1 |
| Application number | US-201816137962-A |
| Country | US |
| Kind code | B1 |
| Filing date | Sep 21, 2018 |
| Priority date | Jan 24, 2018 |
| Publication date | May 14, 2019 |
| Grant date | May 14, 2019 |
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- Title
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Abstract
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This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of treating a lost circulation zone, the method comprising: a) forming a foamed cementitious composition comprising: magnesium oxide (MgO); a salt selected from the group consisting of magnesium chloride (MgCl 2 ), magnesium sulfate (MgSO 4 ), ammonium hydrogen phosphate (NH 4 H 2 PO 4 ), and hydrates thereof; an oxidizer; a nitrogen gas-generating compound; and a foam surfactant; and b) introducing the foamed cementitious composition into the lost circulation zone. 2. The method of claim 1 , wherein the nitrogen gas-generating compound is an azo compound, and wherein the salt is magnesium chloride hexahydrate (MgCl 2 .6H 2 O). 3. The method of claim 2 , wherein the azo compound is about 1% to about 10% by weight of the MgO. 4. The method of claim 2 , further comprising an amine activator selected from the group consisting of carbohydrazide (CHZ), tetraethylenepentamine (TEPA), and hydrazine sulfate. 5. The method of claim 4 , wherein the weight ratio of the azo compound to the amine activator is about 5:1 to about 1:5.
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Classifications
containing cold phosphate binders · CPC title
- C09K8/487Primary
Fluid loss control additives; Additives for reducing or preventing circulation loss · CPC title
of the setting type · CPC title
Magnesium oxychloride cements, e.g. Sorel cement · CPC title
Methods or devices for cementing, for plugging holes, crevices or the like · CPC title
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Frequently asked questions
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- What does patent US10287481B1 cover?
- This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification C09K8/487. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 14 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).